CN216414617U

CN216414617U - Multi-power heating cable

Info

Publication number: CN216414617U
Application number: CN202121124685.2U
Authority: CN
Inventors: 吕为安; 田明; 任玉
Original assignee: Guizhou East New Technology Development Co ltd
Current assignee: Guizhou East New Technology Development Co ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2022-04-29
Anticipated expiration: 2031-05-25

Abstract

The utility model discloses a multi-power heating cable which comprises a plurality of heating wires which are arranged in parallel and have different powers or the same powers in an insulating layer, a grounding wire which is parallel to the heating wires is arranged outside the insulating layer, and a metal shielding layer and a sheath are sequentially wrapped outside the insulating layer and the grounding wire. The heating cable is simple in structure and low in cost, the plurality of heating wires with different or same power are arranged, the use requirement is met, the power of the heating cable can be flexibly adjusted, the energy is saved, the environment is protected, the structural reliability and safety are high, the service life is long, the failure rate is low, the later maintenance labor and financial cost is greatly reduced, the practicability is high, and the popularization is high.

Description

Multi-power heating cable

Technical Field

The utility model relates to a multi-power heating cable, and belongs to the technical field of heating cables.

Background

The heating cable is made into a cable structure, takes electric power as energy, and utilizes alloy resistance wires or carbon fiber heating bodies for far infrared to carry out electrifying heating so as to achieve the effect of heating or heat preservation. Generally, a heating cable has a structure including, from inside to outside, a core wire, an insulating layer, a shielding layer, and a sheath layer, the core wire being a heating wire and a ground wire. The existing heating wire is mostly a constant power heating wire, and most of the heating wires are arranged in parallel with a ground wire. The electric heating cable has the advantages of simple structure, low manufacturing cost and wide application range, but has too few functions, the constant power of the cable generates heat when in use, the energy consumption is serious after long-time use, and the input use cost is higher.

Disclosure of Invention

In view of this, the present invention provides a multi-power heating cable, which can overcome the disadvantages of the prior art.

The purpose of the utility model is realized by the following technical scheme:

the utility model provides a many power heating cable, is different or the same and the heating wire that sets up side by side including the parcel in many powers in the insulating layer, sets up the earth connection parallel with the heating wire outside the insulating layer to it has metal shielding layer and sheath to wrap up in proper order outside insulating layer, earth connection.

The two heating wires are arranged in a power ratio of 1:9, 2:8, 3:7, 4:6 and 5: 5.

The heating wire is composed of a plurality of strands of alloy wires.

The insulating layer is an integrated structure with a plurality of separation cavities, and is formed at one time by combining a one-time multi-extrusion process through a special extrusion die.

The apertures of the separation cavities of the insulating layers are the same or different.

The insulating layer is made of crosslinked polyethylene, silicon rubber, mica tape and fluoroplastic, or two materials are superposed to form a double-layer insulator.

The insulating layer can be provided with a flame-retardant silicone rubber layer with the same structure.

The metal shielding layer is formed by weaving a plurality of copper wires.

The sheath is a PVC sheath or a PE sheath.

Compared with the prior art, the utility model discloses a multi-power heating cable, which improves the existing heating cable, and specifically comprises the following steps: set up many different or the same heating wire of power in heating cable, every heating wire is separated through the insulating layer that has a plurality of partition chambers and formula structure as an organic whole, sets up the earth connection parallel with the heating wire outside the insulating layer to it has metal shielding layer and sheath to wrap up in proper order outside insulating layer, earth connection. The heating wires can be used independently or simultaneously, and can be switched according to actual use requirements, so that the energy is saved and the environment is protected; and each heating wire is a multi-strand heating wire, so that the multi-strand heating wires are not easy to break down, and the service life is long.

The utility model has the beneficial effects that:

the heating cable is simple in structure and low in cost, the plurality of heating wires with different powers or the same power are arranged, the use requirement is met, the power of the heating cable can be flexibly adjusted, energy is saved, the environment is protected, the structural reliability and safety are high, the service life is long, the failure rate is low, the later maintenance labor and financial cost is greatly reduced, the practicability is high, and the popularization is high.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic perspective view of the present invention.

Fig. 3 is a schematic cross-sectional structure of the present invention (embodiment one).

Fig. 4 is a schematic cross-sectional structure of an insulating layer (embodiment one).

Fig. 5 is a schematic cross-sectional structure of an insulating layer (embodiment two).

Fig. 6 is a schematic cross-sectional structure of the present invention (embodiment two).

Fig. 7 is a schematic structural diagram of a dedicated extrusion die.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are illustrative of the utility model only and are not limiting upon the scope of the utility model.

As shown in fig. 1-3, a multi-power heating cable includes a plurality of heating wires 4 wrapped in an insulating layer 3, wherein the heating wires 4 have different powers or the same power and are arranged in parallel, a grounding wire 5 parallel to the heating wires 4 is arranged outside the insulating layer 3, and a metal shielding layer 2 and a sheath 1 are sequentially wrapped outside the insulating layer 3 and the grounding wire 5.

The heating wires 4 can be arranged in two ways, and the power ratio of the heating wires is 1:9, 2:8, 3:7, 4:6 and 5: 5; preferably, the power ratio of the two heat generating lines is 3: 7.

The heating wire 4 is composed of a plurality of strands of alloy wires.

Preferably, the heating wire 4 is provided with two heating wires including a first heating wire 401 and a second heating wire 402, the power of the first heating wire 401 is 13W/m, the power of the second heating wire 402 is 7W/m, and the two heating wires can be used independently or simultaneously; the first heating wire 401 is made of seven alloy wires, and the second heating wire 402 is made of five alloy wires.

As shown in fig. 4 and 5, the insulating layer 3 is a one-piece structure having a plurality of partitioned cavities, which can be formed in one step by a dedicated extrusion die 7 in combination with a one-time multi-extrusion process. The aperture of the separation cavity of the insulating layer 3 is the same or different.

The insulating layer 3 is made of cross-linked polyethylene, silicon rubber, mica tape and fluoroplastic, or two materials are superposed to form a double-layer insulator.

Referring to fig. 6, a flame-retardant silicone rubber layer 6 having the same structure as the insulating layer 3 may be further provided in the insulating layer. The flame-retardant silicone rubber layer 6 is formed by extruding flame-retardant silicone rubber.

The metal shielding layer 2 is formed by weaving a plurality of copper wires.

The sheath 1 is a PVC sheath or a PE sheath.

Referring to fig. 7, the special extrusion die 7 is arranged on the wire extruder, and comprises an outer die 702 and an inner die 701, wherein the rear end of the inner die 701 is provided with a threaded connection part, so that the inner die 701 is sleeved in the outer die 702 and is in threaded connection with the wire extruder; a plurality of through holes 704 are arranged at the front end of the outer die 702, and a plurality of wire passing cavity holes 703 communicated with the inner die 701 are correspondingly arranged in the inner die 701; a plurality of heating wires with different powers or the same power are made to pass through the corresponding wire passing cavity holes 703 and the through holes 704 one by one, and the insulating layers are extruded out at one time.

The extrusion process flow comprises the following steps:

(1) installing a special extrusion die 7 on a wire extruder, wherein the wire extruder is filled with insulating materials;

(2) the first heating wire 401 and the second heating wire 402 respectively pass through the corresponding wire passing cavity holes 703;

(3) the front end of the heating wire is driven by a winding machine to move slowly, the insulating material in the wire extruder enters a gap between the inner die 701 and the outer die 702, flows out of a through hole 704 at the front end of the outer die to wrap the heating wire, and forms an insulating layer 3 to separate and wrap different heating wires under the action of a cooling process.

The extrusion die can realize one-time extrusion molding of a plurality of heating wires with different powers or the same power, and the molded insulating layer 3 is of an integrated structure with a plurality of separation cavities.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention without departing from the technical spirit of the present invention are within the scope of the present invention.

Claims

1. A multi-power heating cable is characterized in that: the heating wire comprises a plurality of heating wires (4) which are different in power or the same in power and are arranged in parallel in an insulating layer (3), a grounding wire (5) which is parallel to the heating wires (4) is arranged outside the insulating layer (3), and a metal shielding layer (2) and a sheath (1) are sequentially wrapped outside the insulating layer (3) and the grounding wire (5).

2. A multi-power heating cable according to claim 1, wherein: the two heating wires (4) are arranged in a power ratio of 1:9, 2:8, 3:7 and 4: 6; 5:5.

3. A multi-power heating cable according to claim 2, wherein: the heating wire is composed of a plurality of strands of alloy wires.

4. A multi-power heating cable according to claim 3, wherein: the insulating layer (3) is of an integrated structure with a plurality of separation cavities, and is formed in one step through a special extrusion die (7) and a one-step multi-extrusion process.

5. A multi-power heating cable according to claim 4, wherein: the aperture of the separation cavities of the insulating layer (3) is the same or different.

6. A multi-power heating cable according to claim 5, wherein: the insulating layer (3) is made of cross-linked polyethylene, silicon rubber, mica tapes and fluoroplastic, or two materials are superposed to form a double-layer insulator.

7. A multi-power heating cable according to claim 6, wherein: a flame-retardant silicone rubber layer (6) with the same structure as the insulating layer (3) can also be arranged in the insulating layer.

8. A multi-power heating cable according to claim 1, wherein: the metal shielding layer (2) is formed by weaving a plurality of copper wires.

9. A multi-power heating cable according to claim 1, wherein: the sheath (1) is a PVC sheath or a PE sheath.